 | Bradley Cooper als Phil Wenneck |
 | Ed Helms als Stu Price |
 | Zach Galifianakis als Alan Garner |
 | Justin Bartha als Doug Billings |
 | Ken Jeong als Mr. Chow |
 | Paul Giamatti als Kingsley |
 | Mike Tyson als Mike Tyson |
 | Jeffrey Tambor als Sid Garner |
 | Mason Lee als Teddy |
 | Jamie Chung als Lauren |
 | Sasha Barrese als Tracy |
 | Gillian Vigman als Stephanie |
 | Aroon Seeboonruang als Monk |
 | Nirut Sirijanya als Fohn |
 | Yasmin Lee als Kimmy |
 | Nick Cassavetes als Tattoo Joe |
 | Sondra Currie als Linda Garner |
 | Bryan Callen als Samir |
 | Brody Stevens als Kingsley Guy |
 | Michael Berry Jr. als Vladi |
 | Andrew Howard als Nikolai |
| Danai Thiengdham als Cell Block Officer |
| Thana Srisuke als Fighting Monk |
| Pairot Noiply als Shouting Man |
 | Penpak Sirikul als Joi |
| Sanita Jai-Ua als Hostess #1 |
| Chanicha Shindejanichakul als Hostess #2 |
 | Vithaya Pansringarm als Minister |
| Kim Lee als Dancer |
| Palakorn Chaiklang als Wedding Band / Ska Ranger |
| Palakorn Gunjina als Wedding Band / Ska Ranger |
| Pongsatorn Sawadchatchawan als Wedding Band / Ska Ranger |
| Kaweewit Chaikaew als Wedding Band / Ska Ranger |
| Pure Watanabe als Wedding Band / Ska Ranger |
| Rattana Janprasit als Wedding Band / Ska Ranger |
| Jetsada Yuktabutra als Wedding Band / Ska Ranger |
| Tanner Maguire als Phil - 12 Years Old |
| William A. Johnson als Stu - 12 Years Old |
 | Aedin Mincks als Alan - 12 years old |
| Dylan Boyack als Doug - 12 Years Old |
| William Jiang als Chow - 12 Years Old |
| Lynne Kidder als Woman at Restaurant |
 | Frédéric North als Helicopter Pilot |
 | Crystal the Monkey als Drug Dealing Monkey |
 | Todd Phillips als Mr. Creepy (uncredited) |
 | Manel Soler als Kingsley Guy #2 (uncredited) |
 | Jessica Lee als Thai Club Girl (uncredited) |
| Todd Phillips | Director |
| Craig Mazin | Screenplay |
| Scot Armstrong | Screenplay |
| Debra Neil-Fisher | Editor |
| Lawrence Sher | Director of Photography |
| Michael L. Sale | Editor |
| Daniel Goldberg | Producer |
| Keii Johnston | Stunts |
| Thomas Tull | Executive Producer |
| Russell Bobbitt | Property Master |
| Christophe Beck | Original Music Composer |
| Justine Arteta | Casting |
| Kim Davis-Wagner | Casting |
| Louise Mingenbach | Costume Design |
| Randall Poster | Music Supervisor |
| George Drakoulias | Music Supervisor |
| David Siegel | Co-Producer |
| Jeffrey Wetzel | Co-Producer |
| Bill Brzeski | Production Design |
| Jon Lucas | Characters |
| Scott Moore | Characters |
| Chris Bender | Executive Producer |
| J.C. Spink | Executive Producer |
| Scott Budnick | Executive Producer |
| Todd Phillips | Producer |
| Todd Phillips | Screenplay |
| David Siegel | Unit Production Manager |
| Jeffrey Wetzel | First Assistant Director |
| Paul Schneider | Second Assistant Director |
| Brian Smrz | Second Unit Director |
| Chris Lowenstein | Line Producer |
| Robert Stadd | Visual Effects Supervisor |
| Cameron Frankley | Sound Designer |
| Cameron Frankley | Sound Supervisor |
| Allan Graf | Stunt Coordinator |
| Seng Kawee | Stunt Coordinator |
| Desma Murphy | Art Direction |
| Philip Toolin | Art Direction |
| Danielle Berman | Set Decoration |
| Peter McCaffrey | "A" Camera Operator |
| Julie Donovan | First Assistant "A" Camera |
| Tulio Duenas | Second Assistant "A" Camera |
| Paul Sanchez | "B" Camera Operator |
| Gregory Irwin | First Assistant "B" Camera |
| Bill Coe | First Assistant "B" Camera |
| Bobby McMahan | Second Assistant "B" Camera |
| Suzanne Dietz | Camera Loader |
| Melinda Sue Gordon | Still Photographer |
| Petur Hliddal | Sound Mixer |
| Carl Fischer | Boom Operator |
| Lisa Dennis | Post Production Supervisor |
| David S. Clark | Additional Editor |
| Ron Bartlett | Sound Re-Recording Mixer |
| Gregg Landaker | Sound Re-Recording Mixer |
| Jon Michaels | First Assistant Sound Editor |
| Jason W. Jennings | Sound Designer |
| Lee Gilmore | Sound Effects Editor |
| David V. Butler | Supervising Dialogue Editor |
| Russell Farmarco | Dialogue Editor |
| David A. Arnold | Dialogue Editor |
| Thomas Whiting | Supervising ADR Editor |
| Dana LeBlanc Frankley | Assistant Sound Editor |
| Thomas J. O'Connell | ADR Mixer |
| Eric Gotthelf | ADR Mixer |
| Doc Kane | ADR Mixer |
| David Jobe | Foley Mixer |
| David Lee Fein | Foley Artist |
| Hilda Hodges | Foley Artist |
| Jason Ruder | Supervising Music Editor |
| Fernand Bos | Supervising Music Editor |
| David Metzner | Music Editor |
| David Feinsilber | Visual Effects Coordinator |
| Jennifer Corey | Production Supervisor |
| Stephen W. Moore | Second Second Assistant Director |
| Patrick Mignano | Location Manager |
| Jeanne Byrd | Script Supervisor |
| Robin McMullan | Costume Supervisor |
| Alison McCosh | Assistant Costume Designer |
| Tiffany Busche | Key Costumer |
| Steve Constancio | Set Costumer |
| Eric Yake | Set Costumer |
| Bob Moore Jr. | Set Costumer |
| Tina Dowd | Costumer |
| Lynne Duggins Weir | Costumer |
| Jason Rainey | Costumer |
| Matt Reitsma | Costumer |
| Janeen Schreyer | Makeup Department Head |
| Clare Gniadek | Hair Department Head |
| Jennifer Bell | Hair Department Head |
| Jarred Waldron | Chief Lighting Technician |
| David Ghegan | Assistant Chief Lighting Technician |
| Hootly Weedn | Lighting Technician |
| Glenn E. Moran | Rigging Gaffer |
| Sean Patrick Crowell | Key Grip |
| John Koth | Best Boy Grip |
| Tim Christie | Dolly Grip |
| Josh Stancil | Key Rigging Grip |
| Max E. Brehme | Property Master |
| Yves De Bono | Special Effects Supervisor |
| Joseph Garner | Associate Producer |
| Christopher Duskin | Second Unit Director of Photography |
| Hans Bjerno | Aerial Director of Photography |
| Dan Levitan | Visual Effects Supervisor |
| Michael T. Kennedy | Visual Effects Supervisor |
| Weston Middleton | Production Assistant |
| Jimmy N. Roberts | Stunts |
